2010-11-21 22:48:11 +00:00
parent 01018862f7
commit 952af43b97
23 changed files with 3314 additions and 0 deletions
@@ -0,0 +1,82 @@
+<?php
+/**
+ * Buffer class for a string.
+ * Will fix issues with sockets that don't care about linebreaks.
+ * Can also be used for all kinds of purpose.
+ * @author jpt
+ * @package Misc
+ */
+class Misc_Buffer {
+
+	/**
+	 * Bufferstring - contains all the data.
+	 * @var string
+	 */
+	protected $buffer;
+
+	/**
+	 * Linebreak to use for pulling lines out of the buffer.
+	 * @var string
+	 */
+	protected $linebreak;
+
+	/**
+	 * Default constructor. Sets a default linebreak and initializes the buffer.
+	 * @param $linebreak
+	 * @return void
+	 */
+	function __construct($linebreak = "\r\n") {
+		$this->buffer = "";
+		$this->linebreak = $linebreak;
+	}
+
+	/**
+	 * Prunes empty lines out of the buffer.
+	 * @return void
+	 */
+	protected function pruneEmptyLines() {
+		if(strpos($this->buffer, $this->linebreak) === FALSE) return;
+		$has_linebreak_at_end = (substr($this->buffer, (-1) * strlen($this->linebreak)) === $this->linebreak) ? TRUE : FALSE;
+		$lines = explode($this->linebreak, $this->buffer);
+		foreach($lines AS $key=>$line) {
+			$line = str_replace($this->linebreak, "", $line);
+			$line = trim($line);
+			if($line === "") unset($lines[$key]);
+		}
+		$this->buffer = implode($this->linebreak, $lines);
+		if($has_linebreak_at_end) $this->buffer .= $this->linebreak;
+	}
+
+	/**
+	 * Appends data to the buffer.
+	 * @param string $data
+	 * @return void
+	 */
+	public function addData($data) {
+		$this->buffer .= $data;
+		$this->pruneEmptyLines();
+	}
+
+	/**
+	 * Returns the next line in the buffer and removes it from the buffer.
+	 * @return string
+	 */
+	public function getNextLine() {
+		if(!$this->hasLines()) return "";
+		list($line) = explode($this->linebreak, $this->buffer);
+		$this->buffer = str_replace($line.$this->linebreak, "", $this->buffer);
+		$line = trim($line);
+		$result = ($line !== "") ? $line.$this->linebreak : "";
+		return $result;
+	}
+
+	/**
+	 * Checks whether the buffer contains more lines to process.
+	 * @return boolean
+	 */
+	public function hasLines() {
+		return (trim(strstr($this->buffer, $this->linebreak, TRUE)) !== "") ? TRUE : FALSE;
+	}
+
+}
+?>